topic Re: Get void form from beam in Revit API Forum

Get void form from beam

Anonymous — Tue, 11 Apr 2017 13:02:57 GMT

Hi,

How to read void forms from selected element in model.

My model element is structural member beam, there in my beam applied cell hole as s void cut,

So that cut I want to remove from this beam,

For that how to access member, family symbol & how to remove void.

Appreciate if you help to solve above.

Thanks

-RK

Re: Get void form from beam

dragos.turmac — Wed, 12 Apr 2017 14:18:34 GMT

Hi,

One possible option would be the following:

1. Get the Solid geometry of the FamilyInstance (your beam) and SolidUtils.Clone() it in a Solid called, say, "cutSolid";

2. Create a new (Sub)Transaction;

3. Delete the FamilyInstance that has created the void in the beam and call a Document.Regenerate();

4. Get the Solid geometry of your beam and use SolidUtils.Clone() again in a solid called, say, "fullSolid";

5. Rollback the transaction started at step 2;

6. Using BooleanOperationsUtils.ExecuteBooleanOperation, subtract "cutSolid" (step 1) from "full Solid" (step 4);

I used a similar code to extract the voids from a wall but I do not know if it works on beams/FamilyInstances, but it's worth a try.

Re: Get void form from beam

GeomGym — Thu, 13 Apr 2017 08:05:38 GMT

Did you try InstanceVoidCutUtils.GetCuttingVoidInstances(element) ? It will work if the void is applied appropriately.

Cheers,

Jon

Re: Get void form from beam

matthew_taylor — Thu, 13 Apr 2017 09:01:22 GMT

Hi @Anonymous,

If the void is in the family, you will probably need to open the family, delete the void, then reload the family into your project.

Re: Get void form from beam

Anonymous — Thu, 13 Apr 2017 09:07:17 GMT

Hi,

Thanks for the information, i'm trying to solve.

-RK.

Re: Get void form from beam

Anonymous — Thu, 13 Apr 2017 12:26:27 GMT

Hi,

How to delete void, any sample or reference if available kindly reply.

Thank you

-RK

Re: Get void form from beam

matthew_taylor — Thu, 13 Apr 2017 13:02:46 GMT

Hi @Anonymous,

This snippet worked okay in a family document in Revit 2017:

 Dim familyDoc As DB.Document = commandData.Application.ActiveUIDocument.Document
        Dim void As DB.GenericForm = _
            New DB.FilteredElementCollector(familyDoc).OfClass(GetType(DB.GenericForm)).Cast(Of DB.GenericForm).Where(Function(s) Not s.IsSolid).FirstOrDefault
        Using trans As New DB.Transaction(familyDoc, "Delete void")
            trans.Start()
            familyDoc.Delete(void.Id)
            trans.Commit()
        End Using

Re: Get void form from beam

Anonymous — Mon, 17 Apr 2017 06:26:26 GMT

Hi,

Thank you matthew.

now i got concept & how to delete cut with help of your reply.

-RK

Re: Get void form from beam

matthew_taylor — Tue, 18 Apr 2017 07:14:27 GMT

Great. Please post complete solution (favoured) or mark my solution as a solution.